2012年7月
Small calcification indicator in ultrasonography using correlation of echoes with a modified Wiener filter
JOURNAL OF MEDICAL ULTRASONICS
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- ,
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- 巻
- 39
- 号
- 3
- 開始ページ
- 127
- 終了ページ
- 135
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1007/s10396-012-0354-y
- 出版者・発行元
- SPRINGER JAPAN KK
The purpose of this study is to improve the calcification depiction ability in ultrasonography using correlation of echoes with a modified Wiener filter.
The waveform of an ultrasound pulse changes when it passes through the location of a calcification. Since the change in echo waveform caused by a calcification decreases the correlation of waveforms in adjacent scan lines, we have proposed a calcification depiction method using the decorrelation of echoes. However, the low signal-to-noise ratio of echoes also decreases the correlation of the echoes. In this study, we employ the correlation of echoes with a modified Wiener filter to suppress the effect of noise, as an indicator of a calcification.
The proposed calcification indicator depicted copper cylindrical rods 0.2 mm in size at a depth of 2 cm with a sensitivity of 80% and a positive predictive value of 80%, despite being hardly depicted at all on B-mode ultrasound imaging.
This study suggests the potential of the proposed method to improve the performance of calcification depiction by ultrasound devices.
The waveform of an ultrasound pulse changes when it passes through the location of a calcification. Since the change in echo waveform caused by a calcification decreases the correlation of waveforms in adjacent scan lines, we have proposed a calcification depiction method using the decorrelation of echoes. However, the low signal-to-noise ratio of echoes also decreases the correlation of the echoes. In this study, we employ the correlation of echoes with a modified Wiener filter to suppress the effect of noise, as an indicator of a calcification.
The proposed calcification indicator depicted copper cylindrical rods 0.2 mm in size at a depth of 2 cm with a sensitivity of 80% and a positive predictive value of 80%, despite being hardly depicted at all on B-mode ultrasound imaging.
This study suggests the potential of the proposed method to improve the performance of calcification depiction by ultrasound devices.
- リンク情報
- ID情報
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- DOI : 10.1007/s10396-012-0354-y
- ISSN : 1346-4523
- eISSN : 1613-2254
- CiNii Articles ID : 10030811569
- Web of Science ID : WOS:000306437300004